Pump trap



Jan.

C. E. BLACK PUMP TRAP Filed Oct. 20, 1938 Lez-7- Patented Jan. 30, 1940 y UNITED STATES ,PATENT OFFECE 4 Claims.

This invention relates to a pump trap, and it is particularly an object of the invention' to provide a trap for use in connection with the polish rod of a deep Well pump and wherein the trap is so position-ed as to prevent loosened particles from the packing in thev stuiing box for the polish rod passing' down Within the tubing and thereby eliminating such particles offering any -hinderance or obstruction to the effective operation of the polish rod or any portions of the pump structure with which the rod may be used.

The invention consists in the details of construction and in the combination andarrangement of the several parts of my improved pump trap whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth,

The Vnovel features of my invention will hereinafter be deiinitely claimed.

In order that my invention may be the better understood, I will now proceed to-describe the same with reference to the accompanying draw- 25 ing, wherein- Figure 1 is a fragmentary view partly in sec- -tion and partly in elevation illustrating a trap constructed in accordance with an embodiment of my invention in applied position upon a polish rod;

Figure 2 is a sectional View taken substantially on the line 2-2 of Figure 1;

Figure 3 is a view slightly in perspective with portions broken away of the bushing member S U with the sections separated.

As disclosed in the accompanying drawing, C denotes a casing having its upper end portion associated in a conventional manner with a casing head H. The head H is provided with conventional gas outlet openings I which are continued through the adjacent portions of the Wall of the casing C.

As illustrated in Figure l of the accompanying drawing, the upper end of the head I-I is provided with an internal rabbet Y2 extending therearound which provides an annular shoulder or ledge 3 spaced inwardly a desired distance from the outer end of the head. The upper end of the casing C terminates substantially iiush with the shoulder or ledge 3.

Extending through the head I-I and within the casing C is an elongated tubular body or member B herein disclosed as cylindrical in form. The lower end portion of this body or member B is reduced, as at 4, preferably a tapering (Cl. 10S-202) i vthe like. The body or member B is of a major QI" prises two duplicate sections I5 each semi-cir-LS.

member or body Bis defined by an outstanding fi surrounding ange S which rests from above upon the shoulder or ledge 3 of the head I-I whereby the member or body B is effectively maintained in applied position. n As illustrated in Figure 1, the upper end of "h the member or body B is closed'by a cap head l, the side wall 8 of which is` integral with the flange 6. This wall 8 of the cap head 'i is pro` vided with the outlet openings 9 for the oil or diameter less than the internal diameter of the casing C so that a space II) is `provided to readily` permit the gas within the well to pass up to and out through the openings I. The central portion of the cap head 'I is provided with an J2-0 opening II in which threads or is otherwise engaged an outstanding surrounding flange i2 provided at the upper or closed end portion of an inner tubular member M. This member M is of desired dimensions and when in applied poi525 sition extends a material distance within the body or member B. v

In the present embodiment of the invention, the upper orouter end of the member M is closed 'by an integral head I4 while the opposite orffo inner end of the member M is normally open. This open end, however, has threading therein or otherwise held a sectional bushing member S. 'Ihis member S, as herein disclosed, comcular in form.

' The straight edges a of the sections i5 are connected by the dowel pin it or the like whereby the sections I5 are effectively maintained in desired assembly when placed within or reinoved@ from the member M. By having the bushing member S sectional it is obvious that the same can be readily placed in desired surrounding relation with respect to the polish rod P which exf tends axially through the member B and Works in -45 the usual manner Within the tubing T.

The iianges Il defining the registering recesses I8 in the straight edges a of the sectionsV i5 allow a suitable tool to be engaged therewith to facilitate the application or removal of the bushing 50 member S. The polishrod P also extends upwardly through a central opening I9 in the top or outer head I4 of the member M. This opening I 9 is of a diameter greater than the diameter of the adjacent portion of the polish rod P and 55 is defined by an outstanding neck or collar 20 in which' threads or is otherwise engaged a tubular shank 2| of the stumng box A. This stuffing box A is a conventional type used in connection with polish rods and comprises a packing 22 generally in the form of rubber rings.

As the polish rod P works up and down through the stuiiing box A the packing 22 often breaks into small pieces or wears away to pieces of such size as to go down through the shank 2l or the like into the well tubing. These pieces in the course of time materially interfere or hinder the effective operation of the pump and in many cases necessitates the pulling of the rod and tubing. However, with my present invention any such pieces are caught and trapped within the member M thereby obviating these disadvantages.

It is to be noted that the member M is of a diameter materially less than the diameter of the member or body B whereby a sucient space 23 is provided to allow free flow of the oil or the like up to and out thru the openings 9.

I find it of advantage to provide the peripheral wall of the member M with a series of minute openings 24 so that oil may enter the member M to lubrlcate the rod P.

From the foregoing description it is thought to be obvious that a pump trap constructed in accordance with my invention is particularly well adapted for use by reason of the convenience l and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modication Without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my lnvention in practice except as hereinafter claimed.

I claim:

l. A trap for the polish rod of a pump comprising a tubular member to extend within the pump casing, a head disposed over the upper end of said tubular member, the portion of said member within the pump casing being of a diameter less than the internal diameter of the adjacent portion of the casing to provide a space for the free flow of gas to the conventional gas outlet openings, means carried by the inserted end portion of the member for coupling to well tubing, a second tubular member extending within the rst tubular member through the head thereof, means for attaching the upper portion of the second tubular member to said head to suspend said second tubular member from the head, said second tubular member having its opposite ends closed, the polish rod having movement through said second tubular member, said second tubular member being of a diameter less than the internal diameter of the first member, said first member having an oil outlet opening in communication with said space between the two members, and a stufling box for the polish rod carried by the upper closed end of the second member.

2. A trap for the polish rod of a pump comprising a tubular member to extend within the pump casing, a head disposed over the upper end of said tubular member, the portion of said member Within the pump casing being of a diameter less than the internal diameter of the adjacent portion of the casing to provide a space for the free flow of gas to the conventional gas outlet openings, means carried by the inserted end portion of the member for coupling to Well tubing, a second tubular member extending within the iirst tubular member through the head thereof, means for attaching the upper portion of the second tubular member to said head to suspend said second tubular member from the head, said second tubular member having its opposite ends closed, the polish rod having movement through said second tubular member, said second tubular member being of a diameter less than the internal diameter of the first member, said first tubing in which the polish rod works, a headclosing the upper end of said member, a second tubular member through which the polish rod extends, said second member being disposed within the rst member through the head at the upper end thereof, means for securing the upper portion of the second member to the head of the rst member to allow the second member to depend Within the rst member from said head, the opposite end of the second member being closed, a stulilng box for the polish rod carried by the upper closed end of theA second member, the second member collecting particles of packing or the like coming from the stufng box, the rst named member having an .outlet opening.

4. A trap for a polish rod comprising a tubular member, means carried by the upper portion of the member to engage a support for maintaining the member in Working position with respect to the polish rod, means carried by the lower portion of the member for connection with a tubing in which the polish rod works, a head closing the upper end of said member, a second tubular member through which the polish rod extends, said second member being disposed within the first member through the head at the upper end thereof, means for securing the upper portion of the second member to the head of the first member to allow the second member to depend within the first member from said head, the opposite end of the second member being closed, a stufng box for the polish rod carried by the upper closed end of the second member, the second member collecting particles of packing or the like coming from the stuffing box, the rst named member having an outlet opening, the side wall of the second tubular member being perforated.

CHARLES E. BLACK.

ist 

